Results 71 to 80 of about 143 (133)
Dianci bileiqi, 2018 系统综述了基于数值仿真计算技术在金属氧化物避雷器（metal-oxide surge arresters,MOA）研究中的应用发展。共分3个方面:1)基于等效电路模型的数值仿真计算;2)基于电、机械与热的两或多物理量（场）耦合的金属氧化物电阻片（metal-oxide surge varistor,MOV）数值仿真计算;3)整只MOA的电场、温度场或多物理场耦合的数值仿真计算。对于MOV的建模和仿真计算,将来主要的努力方向是改进数学计算模型,以便可以描述ZnO晶界与时间和温度相关的特性 ...
赵冬一, 李凡, 汤霖
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A Comprehensive Study on the Quality of Commercially Available Medium Voltage Surge Arresters
IEEE AccessThis paper presents a comprehensive study on the quality and reliability of commercially available medium voltage surge arresters, with particular emphasis on their electrical performance and structural degradation under aging conditions.
Kuba Wojcik +8 more
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IEEE AccessThis paper proposes a snubber circuit for SSCB that performs voltage clamping operation in two stages to reduce surge voltage. The surge voltage is suppressed in the first stage using a MOV with low operating initiation and clamping voltages.
Jae-Hun Cha +3 more
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IEEE AccessAlthough many snubber circuits have been studied, research on circuits that effectively suppress surge voltage while supporting bidirectional operation remains relatively limited.
Jae-Seong Jo +4 more
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Boletín de la Sociedad Española de Cerámica y Vidrio, 2004 Zinc oxide containing rare earth metal and Cobalt oxide are utilized as raw material to make varistors. Some of systems were found to exhibit non-ohmic current-voltaje characteristics and they are applicable not only for low voltaje devices but also for ...
Rodríguez-Páez, J. E. +4 more
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Gaoya dianqi为研究IEEE模型和Pinceti模型对金属氧化物压敏电阻（metal-oxide varistor，MOV）的仿真准确性，以额定电压为150～750 V的6种MOV为对象，理论和试验分析了不同幅值4/10 μs、8/20 μs雷电冲击电流和30/60 μs操作冲击电流下的残压及吸收能量。结果表明，在IEEE模型参数确定中，随操作冲击电流幅值的增大，非线性电阻参考电压取值增大但电感取值减小；在残压预测中，IEEE模型误差为2.6%，较Pinceti模型误差4.6%更准确；在MOV吸收能量估算中 ...
王伟芳 +4 more
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Hypergeometric behavior of metal oxide varistors in DC circuit breakers
Communications in Nonlinear Science and Numerical SimulationYang Liu +6 more
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Simple Model of Metal Oxide Varistor for Pspice Simulation
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2004Metal oxide varistors (MOVs) are commonly used to suppress transients in many applications, such as industrial process measurement and control instrumentation, when exposed to electromagnetic interference. Varistors symmetrical, sharp breakdown characteristics enable them to provide transient suppression performance.
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Varistor Voltage Behavior of Metal Oxide Varistors Stressed by Electromagnetic Pulse
2024 IEEE Joint International Symposium on Electromagnetic Compatibility, Signal & Power Integrity: EMC Japan / Asia-Pacific International Symposium on Electromagnetic Compatibility (EMC Japan/APEMC Okinawa)Kondo, Kensuke, Tsukamoto, Naoyuki
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The physics of metal oxide varistors
Journal of Applied Physics, 1975This paper outlines our present understanding of the conduction mechanisms and physical processes relevant to the performance of ZnO−based ceramic varistors. Varistor behavior is determined by the gross ceramic microstructure of the device as well as by the localized conduction processes which occur between grains. We show that the qualitative features
Lionel M. Levinson, H. R. Philipp
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